We performed a comprehensive preventative maintenance service on a Generac 22kW Guardian Series standby generator for a homeowner in Conroe. Our team conducted a full system inspection and addressed an RPM sense loss error to ensure the unit remains fully operational. We replaced the oil filter and installed a new Duracell battery to guarantee reliable starting power. The service included electrical testing with a digital multimeter, updating the Evolution control panel settings, and configuring the weekly exercise schedule to maintain peak performance. This detailed maintenance protocol ensures the system is ready to provide backup power during any local utility outages.